GB0402102D0 - Method for detecting echo path changes in echo cancellers - Google Patents

Method for detecting echo path changes in echo cancellers

Info

Publication number
GB0402102D0
GB0402102D0 GBGB0402102.8A GB0402102A GB0402102D0 GB 0402102 D0 GB0402102 D0 GB 0402102D0 GB 0402102 A GB0402102 A GB 0402102A GB 0402102 D0 GB0402102 D0 GB 0402102D0
Authority
GB
United Kingdom
Prior art keywords
echo
path changes
detecting
cancellers
echo path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
GBGB0402102.8A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitel Networks Corp
Original Assignee
Mitel Networks Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitel Networks Corp filed Critical Mitel Networks Corp
Priority to GBGB0402102.8A priority Critical patent/GB0402102D0/en
Publication of GB0402102D0 publication Critical patent/GB0402102D0/en
Priority to EP05250270A priority patent/EP1560348B1/en
Priority to US11/045,743 priority patent/US7508931B2/en
Priority to CA2494500A priority patent/CA2494500C/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/234—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using double talk detection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
GBGB0402102.8A 2004-01-30 2004-01-30 Method for detecting echo path changes in echo cancellers Ceased GB0402102D0 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GBGB0402102.8A GB0402102D0 (en) 2004-01-30 2004-01-30 Method for detecting echo path changes in echo cancellers
EP05250270A EP1560348B1 (en) 2004-01-30 2005-01-20 Method for detecting echo path changes in echo cancellers
US11/045,743 US7508931B2 (en) 2004-01-30 2005-01-27 Method for detecting echo path changes in echo cancellers
CA2494500A CA2494500C (en) 2004-01-30 2005-01-27 Method for detecting echo path changes in echo cancellers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0402102.8A GB0402102D0 (en) 2004-01-30 2004-01-30 Method for detecting echo path changes in echo cancellers

Publications (1)

Publication Number Publication Date
GB0402102D0 true GB0402102D0 (en) 2004-03-03

Family

ID=31971771

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB0402102.8A Ceased GB0402102D0 (en) 2004-01-30 2004-01-30 Method for detecting echo path changes in echo cancellers

Country Status (4)

Country Link
US (1) US7508931B2 (en)
EP (1) EP1560348B1 (en)
CA (1) CA2494500C (en)
GB (1) GB0402102D0 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2416971A (en) * 2004-08-04 2006-02-08 Mitel Networks Corp Calculating an expected echo return loss enhancement (erle) in an echo canceller
FR2877516A1 (en) * 2004-11-04 2006-05-05 France Telecom DEVICE AND METHOD FOR DETECTING DIVERGENCE OF AN ADAPTIVE SYSTEM AND USE OF SUCH A DEVICE FOR DETECTING DIVERGENCE OF A DIGITAL FILTER.
US7555117B2 (en) * 2005-07-12 2009-06-30 Acoustic Technologies, Inc. Path change detector for echo cancellation
EP1946454A1 (en) * 2005-11-08 2008-07-23 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Echo path change detection in a network echo canceller
US7817797B2 (en) 2006-06-07 2010-10-19 Mitel Networks Corporation Method and apparatus for detecting echo path changes in an acoustic echo canceller
US8411846B2 (en) * 2008-05-09 2013-04-02 Agere Systems Llc Echo path change detection in telecommunications networks
US10827076B1 (en) 2020-03-11 2020-11-03 Cirrus Logic, Inc. Echo path change monitoring in an acoustic echo canceler

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5330485A (en) * 1991-11-01 1994-07-19 Clayman David A Cerebral instrument guide frame and procedures utilizing it
JPH05304493A (en) 1992-04-24 1993-11-16 Toshiba Corp Echo canceler circuit
US5745564A (en) 1995-01-26 1998-04-28 Northern Telecom Limited Echo cancelling arrangement
US6035034A (en) 1996-12-20 2000-03-07 Telefonaktiebolaget L M Ericsson (Publ) Double talk and echo path change detection in a telephony system
US6226380B1 (en) 1998-02-19 2001-05-01 Nortel Networks Limited Method of distinguishing between echo path change and double talk conditions in an echo canceller
US6369757B1 (en) * 2000-07-05 2002-04-09 Neo Reach, Inc. Smart antenna with adaptive convergence parameter
US6738358B2 (en) * 2000-09-09 2004-05-18 Intel Corporation Network echo canceller for integrated telecommunications processing
GB2371191B (en) * 2001-01-11 2005-06-15 Mitel Corp Double-talk and path change detection using a matrix of correlation coefficients

Also Published As

Publication number Publication date
CA2494500C (en) 2011-04-12
EP1560348A1 (en) 2005-08-03
US20050169457A1 (en) 2005-08-04
EP1560348B1 (en) 2012-01-11
US7508931B2 (en) 2009-03-24
CA2494500A1 (en) 2005-07-30

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)